| 摘要 |
<P>PROBLEM TO BE SOLVED: To allow a base station device to flexibly and efficiently measure channel quality for a mobile station device by controlling transmission of the reference signal for measuring a propagation path, relating to a communications system consisting of a plurality of mobile station devices and the base station device. <P>SOLUTION: The mobile station device includes a reception processing part which performs a detection process of an uplink grant including first information and a transmission command of a sounding reference signal. It further includes a control part which, in a case where an uplink grant including a transmission command of a sounding reference signal is detected with the reception processing part, sets, based on the first information, a cell-specific subframe or the subframe specific to the mobile station device which is such subframe as has been configured by the base station device in advance among cell-specific subframes, as the subframe for transmitting the sounding reference signal, and a transmission process part which transmits the sounding reference signal with the subframe that has been set by the control part. <P>COPYRIGHT: (C)2012,JPO&INPIT |
